static JPanel jCenteredSection(Component c) {
  ret jCenteredSection("", c);
}

static JPanel jCenteredSection(fS title, final Component c) {
  ret swing(func -> JPanel {
    JPanel p = jSection(title, c);
    p.setTitleJustification(TitledBorder.CENTER);
    ret p;
  });
}

static JPanel jCenteredSection(S title) {
  ret jCenteredSection(title, jpanel());
}